Motor.



D. F. DOMIZI.

MOTOR.

APPLICATION men on. 22. 1913.

. Patented Oct. 5,1915.

2 SHEETS-SHEET 1.

D. F. DOMIZI.

MOTOR.

APPLICATION FILED OCT. 22. I913.

Patented Oct. 5, 1915.

2 SHEETS-SHEET 2'.

. mm Z ms sfiml w UN TED STATES PATENT OFFICE.

DAVID F. DOMIZI, OF FRANKLIN, PENNSYLVANIA.

' moron.

vention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures ofreference marked thereon, which form a part of this specification.

' This invention relates to improvements in motors.

The object of the invention is-to provide efficientmeans for startin the engine of an automobile from a state of rest Which means may be disconnected from the engine shaft after the operation of starting has been accomplished.

Before referring in detail to the construc tion and mode of operation of the motor, I.

will first call attention to the annexed drawings in which- Figure 1 is a sectional elevation of my improved starting motor on the line a-a 0 Fig. 2; Fig. 2 is a section on'the line bb of Fig. 1; Fig. 3 is a side elevation of the motor intact; Fig. 4 is a sectional view of the receptacle from which the motive fluid is discharged, together with the fluid-controlling valve; Fig. 5 is a longitudinal sectional view of the valve removed from the motor piston; and Fig. 6 is an" enlarged sectional view on the line 0-0 of Fig. 1 showing the engaging pawl in full.

In the description to follow, similar reference characters will indicate corresponding parts as they are illustrated in the drawings and as referred to in said description.

As before intimated, the drawings illustrate an oscillating type of motor in which the movable member or piston 2 travels in a circular path back and forth within a cylindrical casing 1 conveniently made of two parts suitably united. The said piston is suitably packed and is mounted upon a dowel 3 which is united to a ring 4 in any suitable way. The said ring 4 to which the piston is attached constitutes a movable part of the side wall of the cylinder. In other words, the casings and ring combined make the complete cylinder. This feature is'due to the particular construction and location Specification of Letters Patent.

- Patented 0ct.5, 1915.

Applicationfl1ed0etober22,1918. Serial a... 796,714.

of the arts. Within the ring 4 is mounted a ratc et wheel 5' which is keyed to the motor shaft 6. The shaft 6 may be a cont nuation-of the crank shaft of the automobile engine (not shown) or it may be suitably coupled to said crank shaft. The said ratchet wheel 5 affords a bearing for the ring 4 to which the piston is so connected. The teeth of the ratchet wheel are provided with flat points orsurfaces which thus provide such bearing. The said ratchet wheel is'not used as a bearing, however, except on the return stroke of the piston when the motor is not carrying a load, and when the ratchet wheel is revolving with the shaft of-the motor and the piston itself is not in operation. The connection between the shaft 6 and the piston 2' is controlled by a pawl 7 which is mounted in a recess in the ring 4 and is adapted to engage the teeth of the ratchet wheel 5 to effect such connection during the pressure of the spring casing 1. At thi-s'time the pawl 7 is disconnected from the ratchet wheel 5. Thepawl rides or ratchets over said wheel when the piston is making its return stroke. When the piston has reached the end of the return stroke and before starting onthe direct stroke, the pawl engages the ratchet'and unites the motor shaft 6 with the piston 2. By return stroke is meant the stroke of the piston when the pawlis disengaged and slips over the ratchet wheel. stroke is meantthat in which the piston causes the ratchet wheel, and therewith the shaft 6,- to rotate. It will be understood that after the starting motor has picked up the crank shaft of the engine and has thrown one of the pistons thereof over com-- By direct said pawl or disengage it-from the ratchet,

said pawl having ridden over the teeth of the ratchet during the return stroke of the piston of the starting motor.

'The interior of the casing 1 is partitioned .by a valve-housing or stationary abutment 11 which provides an inlet chamber 12 for the motive fluid and across which a double acting puppet valve 13 moves. Within the separated space on the interior of'the motor the piston 2 and ring 4 move. The abut ment 12 is suitably packed between the ring 4 and the inner circumference of the casing 1. The valve 13 alternately seats on opposite sides of the chamber 12 and terminates in tubular portions or-ends which connect with the space on the opposite sides of the' opening in the abutment 11 and 1communi-.

cates with the inlet chamber 12 in said abutment. Within the inlet tube 17 IS located a hollow plunger 18 which has its inner end tapered and suitably shaped to engage one or the other of the correspondingly tapered surfaces 19 of the-valve. The'said plunger 18 is'engaged bya spring 22 which exerts a constant-pressure inwardly thereon. Said plunger 18 provides an inlet passage for the motive fluid, and in addition thereto, performs the function of holding the valve 13 on one or the other of its seats when said valve is moved to such positions by contact of the sides of the piston 2 with the ends of said valve. The motive fluid enters the plunger 18 from the pipe 20, which will again be referred to. In the'engaging end of said plunger 18 there is provided a suitable number of ports 21 through which the air or steam entering said plunger discharges into the chamber 12 of the abutment 11 and from thence to one or the other side 1 of the space within-the casing 1 to drive the -,pisto11- 2 in one or the other of the directions of'its travel. The drawing, Fig. 1, shows a valve in apo'sition to admit the motive fluid-*to the left of theabutment '11. When the motive fluid has driven the piston 12 around to the extreme position on the right, as shown in dotted lines, the engagement between said piston and the valve on that side will result in said valve being thrown to the opposite seat from that shown in'Fig. 1. The motive fluid at that time begins to exhaust or discharge from the space on the left side of the abutment 11 and the live fluid to enter the space on the right of said abutment to drive the piston back and thus by reversing the valve 13 through engagement with the piston, the

motive fluid is alternately admitted to and discharged from the space on theopposite memes sides of the abutment and between said abntment and the moving piston 2 to drivesaid piston back and forth. The pipe20 .is connected with 1 a valve-housing 23 mounted upon a tank 24 adapted to contain compressed air. Between said tank 24 and said valve-housing 23, ,apipe 25 provides a communication and the outlet to the pipe 20 is controlled by a puppet valve 26 which is normally held uponits seat by a spring 27' to close the passage to said pipe 20. The said valve 26 is lifted from its seat to establish said passage by a cam 28 suitably connected-with a foot-lever 29 within easy reach of the, driver'of the automobile. llhe position of the valve in Fig. 3 indicates that pressure has been applied to said foot-lever and the air within the'tank 24 is discharged to the chamber .12 in the abutment 11.

It will be understood that if my invention is utilized as an ordinary motor and not for the special purpose of a starting motor, the ratchet wheel 5 and the pawl 7 will be eliminated and the piston 2 be directly connected in any suitable manner with the shaft 6.

Having described my invention, 1 claim- 1. In a motor, the combination with a casing, of a valve-housing within said casing having an inlet chamber for the introduction of the live motive fluid to opposite sides thereof, and exhaust passages for the discharge of the motive fluid from opposite sides thereof, a double-seating valve controlling the passage of the live motive fluid from said chamber to opposite sides of said valve-housing, said valve having ports on both sides of. the seating portion thereof which communicate with the exhaust passages in said valve-housing, and a plunger providing a passage in said valve-housing of the motive fluid to said chamber and adapted to lock said valve on one or the other of its seats.

2; In a motor, the combination with a casing having a movable member or piston therein, of a valve-housing in said casing dividing the space on the interior of said cas1ng, and having an inlet chamber and exhaust passages for the motive fluid, a double-seating valve in said chamber having exhaust passages and ports therein, said valve being actuated to reverse its position by engagement of said piston therewith, and

a plunger adapted to hold said valve on either of its seats and through which the motive fluid is discharged to said inlet chamber.

3. In a motor, the combination with a piston, of a valve-housing having an inlet chamber *and exhaust passages therein, a double-seating valve having tubular extensions communicating with opposite sides of said valvehousing and adapted to be actu ated by sald plston, said tubular extensions having ports alternately providing a comcontrolled plunger holding said valve on its seats and providing a passage for the motive fluid to the inlet chamber in the valve-housing.

4. In a motor, the combination with a casing and a piston therein, of a valvehousing having an inlet chamber and sepa rate central passages, a double-acting valve having tubular extensions with circumferential recesses and ports adapted to alternately register with the outlet passages, and

a tubular spring-actuated plunger engaging said valve to hold it upon one or the other of its seats, said plunger being formed to release said valve and rengage it at predetermined times and to provide an inlet for the motive fluid to inlet chamber in said valve-housing.

. Witnesses:

5. The combination with a motor casing and an oscillating piston therein, of a valvehousing havingan inlet opening and'parallel side openings, a double-acting valve member mounted in the housing and having lateral movement relative to said openings, said valve-member having tubular extensions with orifices in the innerportions of said tubular extensions, and a tubular plunger within said inlet openings arranged at a right angle to said valve member, said plunger being adapted to lock the valve on either seat and through which the motive fluid is delivered to the tubular extensions of said valve.

In testimony whereofI aflix my signature, in presence of two witnesses.

-' DAVID F. DOMIZI.

O. D. HUsTIN, IRWIN ZERBE. 

